Gas Safety Certificate London

Book a gas safety certificate in London with OnSite Contractors & Plumbing. We help landlords, and property owners with gas safety inspections across Greater London, with 24/7 availability, including weekends and holidays.

Gas Safety Checks

CP12 certificates

Fast Arrival Time

Greater London Coverage

We provide gas safety inspections across all Greater Lndon

Local Gas Safety Service

OnSite Contractors & Plumbing Ltd provides gas safety certificates in London for homeowners, landlords and businesses across Greater London. With over 10 years of experience, our Gas Safe registered engineers carry out gas safety inspections and other gas work for residential and commercial properties.

We’re available 24 hours a day, 7 days a week, including weekends and bank holidays, so you can contact us whenever you need a gas safety inspection. Whether you need a landlord gas safety certificate for a rental property or a general gas safety check, we’ll help you book the right service. Call us today to discuss your requirements and get your inspection booked.

Why Choose Onsite

24/7 Availability

Call us any time, including weekends and bank holidays, to book your gas safety check.

Gas Safe Registered

We are a team of qualified, registered engineers that professionally carry out your gas safety inspection.

Greater London Coverage

We help customers across Central, North, South, East and West London to get their gas safety certificate.

Experience

We have over 10 years of experience in plumbing, heating and gas services.

What's Included in a Gas Safety Inspection

A gas safety inspection checks that your gas appliances are operating safely and that combustion gases are being discharged correctly. OnSite Contractors & Plumbing helps landlords, letting agents and property owners across London book inspections with a Gas Safe registered engineer from our team.

During a landlord gas safety check, our engineer will:

Inspect Gas Appliances

We inspect gas appliances for damage, leaks and signs of unsafe operation to make sure they are working safely.

Gas Pressure Testing

We check gas pressure and appliance operating pressure to identify issues that could affect safe appliance operation.

Flue and Chimney Checks

Our engineers inspect flues and chimneys to ensure combustion gases are being safely discharged from the property.

Ventilation Checks

Checking that gas appliances have adequate ventilation and air supply for safe operation.

Safety Device Testing

Testing safety devices and controls to make sure they are operating correctly and providing the required protection.

Installation Checks

Our team checks that gas appliances are securely fitted and safely installed in accordance with the relevant requirements.

How to Book a Gas Safety Certificate With Us

01 Contact Our Team

Call OnSite Contractors & Plumbing and tell us where the property is located, whether it’s a home or rental property, and what you need the gas safety inspection for. .

02 Book Your Inspection

Let us know which gas appliances need checking and when you’re available. We’ll help you book a suitable appointment with a Gas Safe registered engineer from our team. .

03 Gas Safety Inspection

The engineer visits your property to check the gas appliances and flues included in the inspection and make sure they meet the required safety standards.

04 Receive Your Gas Safety Certificate

Once the checks are complete, the engineer records the results and any safety issues found. You’ll receive your CP12 certificate (Landlord Gas Safety Record), even if repairs are needed.

Gas Safety Checks for All Major Boiler Brands

Our Gas Safe engineers carry out gas safety inspections for a wide range of boiler brands across London. Each appliance is checked according to its type and installation, including the gas supply, combustion, flue, ventilation and safety controls. Whether you need a gas safety certificate for a Vaillant, Ideal, Worcester Bosch, Baxi or other boiler, we can arrange the required inspection and checks.

Vaillant

Vaillant boilers use electronic controls, sensors and safety components that need to operate correctly during a gas safety inspection. Our Gas Safe engineers check the boiler, gas connections, burner operation and flue, while also checking for signs of unsafe operation. Where required, we can complete the relevant gas safety checks and issue the appropriate certificate.

Ideal

Ideal boilers rely on components such as ignition systems, sensors and electronic controls to regulate heating and hot water safely. During an inspection, our Gas Safe engineers assess the appliance, gas supply, combustion and flue arrangement, looking for faults or signs that could affect safe operation. Once the required checks are complete, we can provide the relevant gas safety certificate.

Worcester Bosch

Worcester Bosch boilers have several safety controls that need to work correctly to maintain safe combustion and operation. Our Gas Safe engineers check the appliance, burner, gas supply, flue and surrounding installation as part of the inspection. We can also identify issues that require attention and complete the necessary checks for a gas safety certificate.

Baxi

Baxi boilers can include electronic ignition, sensors and other safety controls that are checked as part of a proper gas safety inspection. Our engineers assess the boiler and its installation, including the gas connections, combustion, flue and ventilation where applicable. If the appliance meets the required safety checks, we can complete the gas safety certificate.

CORGI

CORGI boilers require the same careful safety checks as other gas appliances, including assessment of combustion, gas connections, flueing and overall appliance condition. Our Gas Safe engineers inspect the installation and check that the boiler is operating safely under normal conditions. Any safety concerns can be identified during the inspection before the relevant certificate is completed.

Combi Boilers

Combi boilers provide heating and hot water from a single appliance, so the boiler and its gas components need to be checked as part of the inspection. Our Gas Safe engineers assess the burner, gas supply, flue, controls and appliance condition to identify any safety concerns. We can then complete the required checks and provide a gas safety certificate where applicable.

System Boilers

System boilers work alongside separate heating and hot water components, making it important to assess the boiler and its gas installation together. Our Gas Safe engineers check the appliance, gas connections, combustion and flue, as well as relevant ventilation and safety requirements. Once the inspection is complete, we can provide the appropriate gas safety certificate.

What People Say

      EXCELLENT  
   Based on 349 reviews 
    
 
 
 
   
 
 
      Posted on Google  
   
   Stuart Harrison 
 17 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Very helpful and efficient, explaining options in simple language
  
 
     Posted on Google  
   
   Marvin Mutebi 
 18 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Came quickly to assess my boiler and had good communication throughout the entire process.
  
 
     Posted on Google  
   
   Spencer 
 19 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Quick, efficient and professional.
  
 
     Posted on Google  
   
   Samantha Henry 
 20 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Quick and efficient. John was lovely, hoping my leak is gone
  
 
     Posted on Google  
   
   Romil Depala 
 20 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Came within 15 mins despite saying 30, super effectively fixed the leak. Highly recommend
  
 
     Posted on Google  
   
   Adam Davis 
 23 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Absolutely brilliant from start to finish. Put a new boiler in a property one day after diagnosing a fault. I didn’t have to worry about one thing - no faffing, just a price given and by the next day it was complete. Armond, John and Claudia were very active throughout the process and offered me free advice to start. I’m always dubious about going with contractors you find on Google but after so many bad experiences - so refreshing for it work out like you always feel it should.
  
 
     Posted on Google  
   
   Somayen G 
 25 days ago
 
 
 Trustindex verifies that the original source of the review is Google. It was a pleasure having Armand helping us with our gas meter leakage issue. He identified the main leaking spot straightaway and had fixed it right the next day. I appreciate how knowledgeable, punctual and professional he is 🙏
  
 
     Posted on Google  
   
   Lamine Kafiz 
 25 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Really happy with the service! Friendly, professional and got the job done properly. Would definitely recommend!
  
 
     Posted on Google  
   
   Keirra Woods 
 26 days ago
 
 
 Trustindex verifies that the original source of the review is Google. My three-year-old turned the switch off at a wall behind a fish tank and he told me to check the switch. He’s a great person very needed the help.
  
 
     Posted on Google  
   
   Matteo Busti 
 28 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Good service from start to finish! The contractor was professional, friendly, and efficient when installing my new boiler. Everything was handled smoothly, and I’m really happy with the work. Highly recommended!

      EXCELLENT  
   Based on 10 reviews 
    
 
 
 
   
 
 
      Posted on Yell  
   
   JohnR-83978 
 1023 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. They came quickly and repaired my boiler perfectly at a fair price. Best boiler repair service in North London, thank you.
  
 
     Posted on Yell  
   
   SaagzS 
 2357 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. Good Gas and Plumbing work. Definitely Recommended.
  
 
     Posted on Yell  
   
   EszterF 
 2366 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. Highly recommend Armand he’s an experienced plumber and he did a great job within a few minutes 

Thank you
  
 
     Posted on Yell  
   
   LindaH-517 
 2370 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. Armand arrived the same morning as I called, keeping me informed as to his expected arrival time. He was very efficient at sorting the problem, which was stopped a leaking pipe. He wore a medical mask and gloves , and was very aware of social distancing and of not touching surfaces unnecessarily, enabling my lodger to remain safely at work in the same room whilst he was there. He is very polite and friendly and gives a clear explanation of what needs doing. He is my go-to person whenever I need a plumber, having been here three times now, and I highly recommend him .
  
 
     Posted on Yell  
   
   GreenTruck74-1 
 3182 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. Fast efficient excellent work at a reasonable  price.
  
 
     Posted on Yell  
   
   BlueDoor61-1 
 3183 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. Very efficient contractor, in time and professional. Will use him again.
  
 
     Posted on Yell  
   
   BlueRock73 
 3183 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. Great service, fast and professional! Thank you very much Armand I recommend you to all my friends and relatives. Well done quality and amazing job!
  
 
     Posted on Yell  
   
   MaroonComputer16 
 3217 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. Excellent service and I am very impressed with the quality of the work. Armand was on time, very trustworthy and exceptionally professional. I highly recommend him to my family and friends for the excellent service. Thank you very much!
  
 
     Posted on Yell  
   
   PurpleTrophy15-1 
 3218 days ago
 
 
 Trustindex verifies that the original source of the review is Yell. I would highly reccommend Onsite Contractors. Armand is always available when we need him, and always does a great job, and he always keeps within the time-frame required. Definitley give these guys a call if you have any maintenance or plumbing work that needs doing! Great professional service.

Gas Safety Certificates Across Greater London

OnSite Contractors & Plumbing helps landlords, homeowners and businesses book a gas safety inspection across Greater London, covering Central, North, South, East and West London. Call us with your postcode to check appointment availability and book your gas safety certificate in London. We’re available 24/7, including weekends and bank holidays, with engineers ready to work based on your location and availability.

Gas Safety Certificate FAQs

What is a Gas Safety Certificate?

A gas safety certificate is a record of the checks carried out on your gas appliances and flues, including any safety issues found. Call OnSite Contractors & Plumbing to book a gas safety certificate in London for your property.

Who needs a Gas Safety Certificate?

Landlords generally need an annual gas safety check for the gas appliances and flues they provide to tenants. If you need a landlord gas safety certificate in London or a commercial gas safety certificate, call us to discuss your property and book an inspection.

How often does a landlord need a gas safety check?

Landlords generally need a landlord gas safety check every 12 months. Existing tenants must receive a copy of the record within 28 days, while new tenants must receive it before moving in. Call us to book your gas safety certificate for landlords.

What does a gas safety inspection cover?

A gas safety inspection covers the relevant gas appliances and flues, with checks carried out to identify any safety issues. Call us to book a gas safety check and have your property’s gas appliances inspected.

How long does a gas safety inspection take?

It depends on the size of the property and how many gas appliances need checking. Call us with your property details, and we’ll help you book a suitable appointment for your gas safety certificate.

How quickly can I book a Gas Safety Certificate?

We’re available 24/7 to help you book a gas safety certificate near you across Greater London. Appointment times depend on your location and availability, so call us to discuss the next available appointment.

What happens if an appliance fails a gas safety check?

If an appliance is found to be unsafe, it must not be used until the necessary repairs have been completed. Any defects will be recorded. Call us to discuss the next steps, book a CP12 certificate inspection and repair or replace the necessary parts.

How do I get a landlord gas safety certificate?

Call OnSite Contractors & Plumbing to book a landlord gas safety certificate for your home, business or rental property. We’ll help you arrange the inspection and the CP12 certificate once the required checks have been completed.

Need more help?

Get in touch with our team to get a gas safety inspection and your gas certificate!

Book Your Gas Safety Certificate

Need a gas safety certificate for a rental property in London or want to arrange a gas safety inspection? Contact OnSite Contractors & Plumbing to discuss your requirements and book an appointment across Greater London.

Available 24/7 for enquiries, including weekends and holidays. Call now!